Mix the Dough:
In a large bowl, combine the flour, active sourdough starter, water, and sugar. Stir until a shaggy dough forms.
Add the salt and butter. Knead for 5-7 minutes until the dough becomes smooth and elastic.
First Proof:
Cover the bowl with a damp cloth and allow the dough to rest for 4-5 hours in a warm area. It should double in size.
Shape the Rolls:
Once the dough has risen, gently deflate it. Divide the dough into 12 equal portions.
Shape each portion into a ball and place them on a parchment-lined baking sheet.
Second Proof:
Cover the shaped rolls with a cloth and let them rise again for 2-3 hours, or until puffy.
Preheat the Oven:
Preheat your oven to 220°C (430°F). Place a baking tray of water at the bottom of the oven to create steam.
Bake:
Bake the rolls for 20-25 minutes or until they are golden brown and sound hollow when tapped on the bottom.
Let the rolls cool on a wire rack before serving.